We currently use the macOS 11 SDK in CI for arm64 Firefox builds, but we're still using the 10.12 SDK for x86_64 Firefox builds. We should use the macOS 11 SDK for both. This will have the following benefits: - It will avoid compatibility paths in macOS system libraries and get us on the "happy path". Apple expects apps to adopt new SDKs somewhat quickly. Building with an older SDK enables runtime behaviors in macOS system libraries that don't receive a lot of testing from Apple. We've seen various amounts of breakage in the compatibility paths when new versions of macOS were released. (The most striking one was a crash after sleep when touch bar macs were originally released, bug 1320048. This only happened on apps built with an older SDK.) - As an example of the above, updating to the macOS 11 SDK will avoid spammy touch bar related warnings that are currently printed to the console whenever a Firefox window is opened (bug 1687365). - It is a necessary prerequisite for raising our minimum supported SDK version to the macOS 11 SDK, which will improve the quality of life for Firefox developers on macOS.
Bug 1696504 Comment 0 Edit History
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We currently use the macOS 11 SDK in CI for arm64 Firefox builds, but we're still using the 10.12 SDK for x86_64 Firefox builds. We should use the macOS 11 SDK for both. This will have the following benefits: - It will avoid compatibility paths in macOS system libraries and get us on the "happy path". Apple expects apps to adopt new SDKs somewhat quickly. Building with an older SDK enables runtime behaviors in macOS system libraries that don't receive a lot of testing from Apple. We've seen various amounts of breakage in the compatibility paths when new versions of macOS were released. (The most striking one was a crash after sleep when touch bar macs were originally released, bug 1320048. This only happened on apps built with an older SDK.) - As an example of the above, updating to the macOS 11 SDK will avoid spammy touch bar related warnings that are currently printed to the console whenever a Firefox window is opened (bug 1687365). - It is a necessary prerequisite for raising our minimum supported SDK version to the macOS 11 SDK (bug 1696513), which will improve the quality of life for Firefox developers on macOS.